28 NOTES
Advanced Platform Development
Rebuilding a complete self-hosted data platform from FOSS on Kubernetes, one working component at a time.
→ Start hereSessions Left the Protocol. Put the Handle in the Argument.
platform_info mints dps_…; the model threads it. Go SDK v1.7.0, MCP 2026-07-28.
→ Read this noteLatest note · folio diagram
flowchart LR
INFO["platform_info"] -->|"mints dps_…"| ROW[("sessions row<br/>TTL 8h")]
AGENT["model"] -->|"session_id argument"| GATE{{"SESSION_REQUIRED<br/>or SESSION_EXPIRED"}}
ROW --> GATE
GATE --> TOOL["gated tool"]
This is MCP by Design, an ongoing development log of mcp-data-platform, a Go server I run in front of a warehouse, a catalog, object storage, APIs, other MCP servers, and a knowledge base, also hosted as Plexara. The …
Current Series
20 NOTES
MCP Without the SDK
The Model Context Protocol taken apart one JSON message at a time, written by hand in Go.
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5 NOTES
MCP Studies
Measured studies of MCP agent behavior: knowledge-layer ablation, stored-knowledge use, the measurement harness, knowledge pollution, and cross-reference document completion.
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5 NOTES
AI on a Leash
Mechanical verification for AI-written code: strict linting, coverage gates, mutation testing, and a pre-commit gate that refuses the commit.
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Recent Notes
146
Don't Ingest the CSV. Point Hive at It.
Hive still maps a table name to a directory of files
2026-08-26
145Don't Sandbox Python. Embed Starlark.
starlark-go in a Go server: FileOptions, host bindings, and a cancel watchdog
2026-08-24
144God Packages and Other Slow Failures
Structural ratchets for AI-assisted Go, six months into make verify
2026-08-22
143Do Cross-References Help LLM Agents Complete Documents?
The agent found every page certified unreachable. Links cut search cost and keep working when search is off; they do not change what it reaches
2026-08-20
142Knowledge Pollution: Verification Displacement, Capability, and the Price of a Curation Gate
A wrong note that passed review spread only where the agent could have checked it, and only on Haiku 4.5: 16 of 24, against 0 of 24 on Sonnet 5 and Opus 5
2026-08-17
141On-Prem GPUs in a Boring Kubernetes Cluster
Adding your own GPUs to the platform with the NVIDIA GPU Operator
2026-08-12
140One Cluster Across Clouds and Your Garage: Hybrid k3s With WireGuard
A single Kubernetes cluster spanning cloud regions and your own hardware, encrypted over the public internet
2026-08-10
139What Happened to the Blockchain Chapter
Why the chapter is cut from this rebuild, and where tamper-evidence lives in 2026
2026-08-08